An organization is looking to outsource its data-center infrastructure to better manage compute, network, and storage resources, eliminate most hardware maintenance, and scale up or down quickly. Which cloud service model best meets these needs?
Infrastructure as a Service (IaaS) delivers on-demand virtualized compute, storage, and networking over the internet, so the provider maintains the physical data-center hardware while the customer controls the operating systems, middleware, and data. This directly addresses the desire to offload hardware maintenance and gain scalability.
Software as a Service (SaaS) focuses on delivering complete software applications, not raw infrastructure. Platform as a Service (PaaS) supplies a managed runtime and development environment but still abstracts the underlying infrastructure. Hybrid Cloud describes a deployment that mixes on-prem and public-cloud resources; it is not itself a service model.
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CompTIA A+ 220-1101 (V14)
Virtualization and Cloud Computing
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